Furnace-slagging apparatus



. May 15. 1928.

- H. E. DUNKELBERGER ET AL FURNACE SLAGGING APPARATUS Filed July 15, 1927 INVENTORS Patented May15, 1928.

UNITED. S AT I v 11,669,696 PATENT OFFICE.

HARRY IE. DUNKELBERGI ER AND NICK WITTIER S, OI WEIRTON, WEST VIRGINIA.

FURNACE-SLAGGING arrannros.

Application filed July 15 This invention relates broadly to furnace slagging apparatus, and more specifically to a furnace embodying apparatus whereby linings of refractory material may be introduced for protecting the walls thereof. 1

The primary object of the invention is to provide, in association witlrthe front or rear walls of an open hearth furnace, mechanical means whereby a lining of refractory material, as dolomite, may be introduced within the furnace for protecting said walls from the intense heat of the furnace.

A further object is to provide a furnace which embodies therein means by which slagging of the walls thereof may be accomplished with facility and without interfering with the normal operation thereof.

In describing the invention in detail, reference is herein had to the accompanying drawings, in which- Figure 1 is a vertical section of a furnace equipped with our invention; and

Figures 2 and 3 are sections talren, respectively, on lines 22 and 33,-F1g. 1.

Referring to said drawings, 1 designates the side wall and2 thearch of a furnace of open hearth type, said wall being abutted exteriorly by upright buckstays .3, as ordinarily.

Suitably mounted upon the buckstays '3 at an appropriate elevation is ahorizontally disposed metal slab 1 of materially less thickness than the wall 1, and rigidly carried in parallel relation to said slab at a spaced distance from the inner face of the latter is a. horizontal. channel iron skewback 6 which constitutes 'thesupport for the adjacent edge stays 3.-

portion of the furnace arch or -1-o0 2. Blocks 5 located at suitably spaced intervals between said slab land said skewback 6 serve to space said members apart toprovide therebetween a passage, or a series'of alined passages, 7 through which the dolomite slagging, or other suitable material may be introduced Within the furnace, as willhereinafter be described. Said blocks 5 are securedin place by means of bolts-8 which also serve'to maintain the skewback in fixedrelation to the walhslab 4, as-shown. skewbac'kis additionally, supported by substantially upright tie-rods 9 attached to a suitable overlying part of the furnace structure, as by cross-beams 1O connecting the upper ends of oppositely disposed. buck- Entending longitudinally ofthe furnace Said 6 19am Serial No. 206,031.

above the level ofthe arch 2 is a bin or hopper 11 which communicates along its bottom end with the passage 7, the same being designed for the reception of the dolomite or other material 12 which is to be employed as an internal slagging for the underlying furnace wall 1. A damper-like valve-or gate comprising a plate or series of alined plates 13, slidable upon a side wall of the hopper to and from closing relation to the bottom opening of the latter, is designed to control the feed of the slagging material to said passage 7. Rods 14 connected to said plate/or plates 13 provide means whereby the latter may be positioned by hand as desired.

The arch-supporting skewback 6 is spaced from the top of the adjacent wall 1, forming therebetween a longitudinally extending space 15 in which ismounted in alined relation a series of closures or valves 16 whereby the lower ends of the passages 7 may be opened and closed. 7 Each'of said valves 16, as herein shown, is constructed of heavy sheet metal and is made of hollow container form so thatit is ada-ptedto be cooled by flowing. water, such water' being admitted theretoadjacent to one end by means of a ther'ebyrcarried inlet pipe 17 and being discharged therefrom at a point adjacent to its opposite end by: means of a thereby-carried outlet pipe 18. Said pipes 17 and 18 have flexibleconnection, as through lengths of rubber tubing 17 and18, respectively, with suitably located water supply and outlet pipes (not shown).

The valves 16 are disposed abutting relation, each thereof extending from the. center line of the inner face of one buckstay 3 to the center line of the next adjacent buckstay, as shownin Fig. 3. Each in substantially of said valves has a substantially flat top I portion 16- and 16", the latter beingseated adjacent to its opposite ends upon supports constituted by pipes 19 of U shape which are directed inwardly through the buckstays'and which, except at the curved connecting portion 19 thereof. have their uppermost survalves 16 occupies the position. shown in broken lines in Fig. 1 wherein it wholly closes both the space and the overlylng passage-7., against the outward passage from the furnace interior of heat and other prodnets of combustion, the innermost portionof the valve, which, in cross section, has the.

form of a tapered nose 16, seating in underlying relation to the arch 2, or to the skewback 6. Whenthe'valve is rotated to the full line position shown in Fig. 1,.ef-

fected by hand power applied through the 'slagging the furnace may be performed by pipes 17 and 18 employed as levers, the rear edge of the flat top portion 16 of the valve seats against the lower edge of the slab 4:, so thatsaid valve closes the space 15 agalnst theoutward passage therethrough of products of combustion, a'n'dthe passage 7 is opened to permit substantially unobstructed downward flow from said passage .of slagging material admitted from the hopper 11 past the gate 13. In said position of the valve the flat top portion 16 is downwardly and inwardly inclined and constitutes, in of feet, a short chute over which the slagging' material-passes by gravity to the interior of the furnace and by which said material is deposited in close proximity to the wall 1 where it piles up',or becomes banked, for performing its function as a protective lining for said wall.

i In practice, the slagging material is deposited in the hopper 11 while the gate 13 occupies closed position. When slagging of the furnace wall 1 is desired,'the valve or valves 16 are first rotated to open position,

following which 'the gate or gates are opened. hen the required amount of slagging material has been admitted, or when, for any reason, it is desired to stop the flow of said material, the gates are first closed and then when the passage or passages'7 have'been cleared of the material, the Valve or valves 16 are rotated to their closed positions. 1

I The pipes 19 are, carried by the various buckstays, shown, and constitute conduc tors for running water by which they are cooled. c g

It will be noted that the operation of of a longitudinally. extending opening, a hopper forslagging materiallocated over said arch, gravity feed passages leading past said arch from said hopperto said opening, and a rotary valve in said opening adapted, in one position, to close said passages against downward feed of said material and, in another position, to open said passages and to direct materialgravitating through the latter to a position for banking against the inner face of said wall. f

' 2. In a furnace of the character described,

, a wall having therein beneath the arch thereof a longitudinally extending opening, a

hopper for slagging material, located over said arch, gravity feed. passages'leading past sa d arch from said hopper to said opening,

and a rotary valve in said opening adapted,

in one position, to close the lower ends of said passages and, in anotherlposition, to permitgravity flow of said material into lining-forming relation to the inner face of said wall.

3. In afurnace of the character described,

a wall having therein beneath the arch thereof a longitudinally extending opening,- a

hopper for slagging material located over. said arch, gravlty feed passages leading past said arch from said hopper to said opening,

and a rotary valve in said opening adapted, in one position, to close the lowerends of said passages and, in another position, to j I permit gravity fiow'of said ,material into lining forming relation to'the inner face of said wall, said valve h'avinga hollow. watercooled construction.

4.-In a furnace of adjacent to the top of a Wall of the latter,

and' a horizontally disposed rotary valve whereby said passages may be opened and closed. 1

5. In a furnace of the character described,

a slag container located over the furnace arch, gravity feed passages leading from said container to the interior of the furnace adjacent to the top of a wall of the latter, andqa horizontally disposed rotary valve whereby said passages may be openedand closed, a surface of said valve forming a reflecting chute for g'ra'vitating slag.

6. In a furnace of the character described, a slag-container located over the furnace arch, gravity feed passages leading from sald containerto the interior of the furnace the characterdescribed, a slag-container located over the furnace arch, gravity. feed passages leading from said container to the interior of the furnace adjacent to thetop of a wall ofjjthe latter,

and a horizontally disposed rotary valveof hollowwater-cooled form arrangedto control the admission of slag through said passages.

7. In a furnace of the character described, anarch, means whereby said arch issupported relative to an a jac ent furnace wall for forming intermediate vertical passages, a hopper communicating through its bottom with said passages, said wall having therein a longitudinally extending opening through which communication may be had between said passages and the interior of the furnace, and a valve mounted for rotary movement in said opening for controlling such communication.

8. In a furnace of the character'described, an arch, means whereby said arch is supported relative to an adjacent furnace wall for forming intermediate vertical passages, a hopper for feeding material to said passages, a shiftable gate for controlling communication between said hopper and said passages, said wall having below the arch an opening extending horizontally from end to end thereof, and a valve disposed in and closing said opening against the escape from the furnace of products of combustion, said valve being shiftable into and out of closing relation to said passages.

9. In a furnace of the character described, an arch, means whereby said arch is supported relative to an adjacent furnace wall for forming intermediate vertical passages, a hopper for feeding material to said passages, a shiftable gate for controlling communication between said hopper and said passages, said wall having below the arch an ing artificially cooled.

opening extending horizontal from end to end thereof, and a valve disposed in and closing said opening against the escape from the furnace of products of combustion, said valve being shiftable into and out of closing relation to said passages, and, when occupying passage-opening position, being adapted to direct such material to a position wherein it becomes banked to form aprotective internal lining for said wall. I

10. In a furnace of the character described, an arch, means whereby said arch is supported relative to an adjacent furnace wall for forming intermediate vertical passages, a hopper Ior feeding material to said passages, a shiftable gate for controlling communication between said hopper and said passages, said Wall having below the arch an opening extending horizontally from end to end thereof, and a valve disposed in and closing said opening against the escape from the furnace of products of combustion, said valve being bodily rotat able relative to said passages for controlling the flow of material from the latter and be- In testimony whereof we afi'ix out signatures.

HARRY DUNKELBERGER, NICK WITTIERS. 

